Cooling device for marine engines



CO-OLING DEVICE-FOR MARINE ENGINES Filedoct. e, 1923 x wlwntoz @agg/Z* n/zes an out-boardl engine' unit ofa Well known type which is secured to the stern of a boat Patented Jan. 15, 1924.

,UNITED STATES RUDOLPH TOENNES, OF

COOLING -IlJEV-ICE FOB MARINE ENGINES.

BATENT oli-Fics..-

"la BOONVILLE, MISSOURI. y

Application led October 6, 1923. Serial Nb. 667,036.

This invention relates to improvements in' cooling devices for engines, and has' for its object to provide a means for such purpose which can be used in connection with ma.- rine explosive engines, 'especially of the outboard type, andobviating the use of a force-pump for ,circulating the water through the watervjacket of the engine..

This and other objects hereinafter set forth are attained by the means illustrated in the accompanying drawing, which shows an outboard engine attached to the stern of a boat and provided with theimproved cooling means. j

lReferring to the drawing, 10 designates by the clamp"v 11 and is provided 'with an exhaust manifold 12 and also a rudder 13 at its rear side.

Outboard engines of this character are usually provided with a plunger-pump for forcing the cooling water through the engine jacket, but this method is objectionable in that, in sandy or salt waters the pump fills with grit and dirt and continuously causes trouble for the owners of the boat. This invention avoids the use of a plunger-pump and consequently overcomes the serious objections mentioned. f

This invention consists in locating a water-intake 14 in or attached to the rudder 13. and connecting this inlet 14 to the water jacket ofthe engine with a flexble'pipe 15. The mouth 16 of the water-intake 14 is preferably located at the front side-of the rndder slightly above the axis of theprope-ller shaft 17 and behind the position of the propeller blades when they are at the top side of the propeller shaft during their revolution. At this point of revolution theI propeller blades force the water rearwardly and consequently directly into the mouth .16 of the water-intake let and through the same and also the pipe 15 into and through the water 'acket of the engine and discharges throng a pipe 17 into'the exhaust manifold 12l1n'a manner common to this class4 of en 'nes.

he 'water-intake 14 is preferably cast Vin the rudder and can be either circular, square or oblong in cross-section, and is preferably funnel-shaped, having a relatively large -mouth and gradually tapered towards the 'rear side of the rudder, thereby forming a nozzle-shaped. intake to increase the force of the water passing to the Water jacket.

As shown in the drawing, intake 14 is curved upwardly from its mouth thereby loeating its discharge end 19 at the top side of the rudder,- and this discharge end is provided with a nipple 20, attached in any suitable manner or cast integral with the rudder, to which is secured one end of the exible pipe 15. This flexible water connection between the engine jacket and the rudder permits the rudder to move from side to side to alter the course of the boat.

tion, what is claimed is 1. A cooling device for outboard marine engines comprising a rudder provided with' a 'water-intake having its mouth adjacentto and to the rear of the boat propeller, and a flexible pipe connection between the discharge end of said intake and the water jacke-t of the engine. I l

2. A cooling device for outboard marine engines comprising a rudder provided with a Water-intake having its mouth adjacent to and to the rear of the boat propeller, and a 'flexible pipe connection between the discharge end of said intake and the water jacket of the engine, said water-intake lbeingi tapered from its mouth to its discharge en 3. A cooling device for outboard marine engines comprising a rudder provided with a Water-intake. having its mouth adjacent Having thus .fully described the invento and to the rear of the boat propeller, l

the propeller blades in their topmost po-v sition. y 4. A cooling device for outboard marine engines comprising a rudder-.provided with end and having its mouth located at the a water-intake having its mouth adjacent front side of the rudder adjacent the proto andto ,the rear of the boat propeller', peller of theboat and its discharge end at 10 and a exible `pipe connection between the `the top -side of the rudder. 5 discharge end of said intake andithe water In testimony whereof I affix my signajacket of the enginefsaid Water-intake Abe-l turet mg taperedg'from its mouth to its discharge RUDOLPH TOENNES. 

